Description

The FSD-AF-FA has been designed and tested to exceed all UL, ULC and NFPA requirements for fire dampers as well as smoke dampers. They are intended for use where building codes call for the fire damper to also operate as a smoke damper. UL555 and ULC S112 listed and labelled as a 1.5 hour fire damper / UL555S and ULCS112.1 listed and labelled as a Leakage Class I / Class II Smoke Damper with airflow in both directions. UL and ULC listed for vertical mounting. Fusible link/actuator (DLT-1) provides an automatic override system to close and latch damper in the fire mode. Also available with automatic resettable/override release options (model STO/R or DTO/R to provide complete discretionary control of smoke functions during a fire/smoke emergency). See STO/R and DTO/R submittal drawings for complete details. Spring return type damper motor controlled by a smoke detector is recommended to provide proper operation in the smoke mode.